Insider Activity Tracker

On SEC EDGAR under Forms 3, 4, and 5 (insider transactions), Schedules 13D/13G (5%+ holders), and the DEF 14A proxy. Aggregators like OpenInsider, SEC EDGAR full-text search, Finviz, and WhaleWisdom (for 13F) also compile this. AlgoKing's Insider Activity Tracker aggregates this data for you.

No. Insider buying is a positive signal, but should be combined with fundamental analysis. Use it as a filter or confirmation, not the sole criterion. Also verify the quality of the transaction (open-market purchase vs option/RSU exercise, size, and insider seniority).

No. Insiders sell for many benign reasons: diversification, personal expenses, tax planning, and option/RSU exercises (often via 10b5-1 plans). What's concerning is cluster selling (multiple insiders), consistent selling at highs, or selling just before bad news.

Companies impose 'blackout periods' - typically from quarter-end until about 1-2 days after earnings are released - during which insiders cannot trade. Many insiders also use pre-arranged Rule 10b5-1 plans to schedule trades. This prevents trading on unpublished financial information.

Check when you receive alerts for significant activity. Do a monthly review of your holdings. Check before making new investments. AlgoKing automates this with real-time alerts.

Look for: open-market purchases (vs option/RSU exercises), senior insiders (CEO/CFO vs lower employees), size relative to holdings, and whether they hold or immediately sell. An exercise-and-hold is more meaningful than exercise-and-sell. Form 4 transaction codes ('P' for open-market purchase) help distinguish these.

Generally: <10% is low risk, 10-25% moderate, 25-50% high risk, >50% critical. But context matters - compare to sector norms and the company's cash flow. A rising pledge trend is more concerning than a stable level. (U.S. pledging is disclosed in the annual proxy.)

Aggregate insider activity across all stocks in each sector. Sectors with net insider buying may outperform. This can be a leading indicator - insiders collectively see sector trends before they're obvious.

U.S. research suggests 3-12 months for the signal to fully reflect in prices. There is some immediate effect, but most outperformance accumulates over 6+ months. This is a medium-term signal, not for day trading.

Sales under a pre-arranged Rule 10b5-1 plan or a registered secondary offering are scheduled or pre-announced and are less concerning than unexpected open-market sales. Context matters - check whether the sale is under a 10b5-1 plan and the stated reason.

Calculate net insider buying (weighted by insider seniority), normalize cross-sectionally and vs the stock's own history, apply decay for older transactions, and combine with cluster and pledge adjustments into a composite score. Backtest long the top quintile, short the bottom.

Strong features include: transaction size relative to holdings, insider type/seniority, cluster indicator, time since last transaction, Form 4 transaction code, plus stock features (momentum, valuation, volatility) and contextual features (earnings proximity, market regime).

Early warning signs: a rising pledged-share trend, multiple key officers exiting, consistent insider selling at highs, late/delinquent Form 4 filings, and an increase in related-party transactions. Combine these into a governance score and monitor for deterioration.

Limitations include: filing delays (Form 4 within 2 business days), thinner coverage for small caps, difficulty distinguishing affiliated parties, option/RSU 'noise', and the fact that insiders can simply be wrong. Some may also time transactions around pre-set 10b5-1 plans.

Treat it as a separate factor with low correlation to traditional factors. Combine with value, momentum, and quality. Weight based on backtest performance. Use it as an overlay or tilt rather than a primary factor, and monitor for factor crowding.